[PATCH/RFC] git-am: Make it easier to see which patch failed

When git-am fails it's not always easy to see which patch failed,
since it's often hidden by a lot of error messages.
Add an extra line which prints the name of the failed patch just
before the resolve message to make it easier to find.

Signed-off-by: Jonas Flodén <redacted>
---
Johannes Schindelin wrote:

Maybe

-               echo Patch failed at $msgnum.
+               echo Patch failed at $msgnum($FIRSTLINE).

How about this instead. Though the line could get very long.
This makes the line stand out a little more.

 git-am.sh |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/git-am.sh b/git-am.sh
index 4b157fe..09c2f9c 100755
--- a/git-am.sh
+++ b/git-am.sh

@@ -501,7 +501,7 @@ do
 	fi
 	if test $apply_status != 0
 	then
-		echo Patch failed at $msgnum.
+		printf '\nPatch failed at %s (%s)\n' "$msgnum" "$FIRSTLINE"
 		stop_here_user_resolve $this
 	fi

-- 
1.6.1.28.gc32f76